| BasicAuthenticationEntryPoint | Used by the ExceptionTraslationFilter to commence authentication via the BasicAuthenticationFilter. |
| BasicAuthenticationFilter | Processes a HTTP request's BASIC authorization headers, putting the result into the
SecurityContextHolder. |
| DigestAuthenticationEntryPoint | Used by the SecurityEnforcementFilter to commence authentication via the DigestAuthenticationFilter. |
| DigestAuthenticationFilter | Processes a HTTP request's Digest authorization headers, putting the result into the
SecurityContextHolder. |
| NonceExpiredException | Thrown if an authentication request is rejected because the digest nonce has expired. |